Annunciator



(No Model.)

2 Sheets-Sheet l W. 0 CLARK.

ANNUNGIATOR.

Patented Deo.. 18, 1888.

Witnesses: Inventor.

2 Sheets-Sheet 2.

(No Model.)

W. G. CLARK.

ANNUNOIATOR.

No. 394,555. Patented Dec. 18, 1888.

Witnesses: W 42; J M

UNIT D STATES PATENT OFFICE.

VILLIAM C. CLARK, OF PORTLAND, MAINE.

ANNUNCIATOR.

SPECIFICATION forming part of Letters Patent No. 394,555, dated December 18, 1888.

Application filed October 20, 1888.

T 0 all whom, it may concern.-

Be it known that I, \VILLIAM C. CLARK, of Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Annunciators; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of refthe same post, said revolving sleeve having a projection to correspond with a recess in the end of the sliding thimble.

Referring to the accompanying drawings, Figure 1 is an elevation showing drop in position before signal is given. Fig. 2 is an elevation showing drop in position after signal is given. Fig. 3 is a detail showing in elevation a different method of attaching the revolving sleeve, and Fig. 4 is a section of Fig. 3.

In all these figures similar letters of reference refer to like parts.

Upon a suitable base or yoke, a, are mounted the electro-magnets b and the spindle c between the two magnets b, as shown in Figs. 1 and 2. Sliding on spindle c is an armature, d, having sleeve 6 permanently attached thereto. In the end of sleeve 6 are the two recesses g and h, said recess 9 permitting sleeve 6 to slide back and forth 011 spindle c, the spur i, set in said spindle, limiting the outward movement of the sleeve and preventing it from revolving. A spring, f, arranged in any convenient place or manner, constantly tends to force the armature and its sleeve outward. On the outer end of the spindle is placed a revolvin sleeve, j, carrying the dropsignal I; an d resetting-arm 7r, permanently at- Serial No. 288,711. (No model.)

tached to the sleeve and revolving therewith. On the inner end of the revolvin sleeve is a projection, 11, adapted to enter recess g in sliding sleeve e and to be held on the side thereof when the sliding sleeve forced out against the revolving sleeve, as seen in Fig. 1, and to be released therefrom when the sliding sleeve is drawn back, as seen in Fig. 2. The revolving sleeve must not slide. To prevent this and to limit the revolution, a spur, m, is set in the spindle c, and a slot, I, made in the sleeve, as shown in Figs. 2 and 3. The revolution of the sleeve would also be limited by the projection a striking against the opposite sides of the two recesses g and h.

The method of attaching the drop-signal and resetting-arm to the revolving sleeve may be as shown in Figs. 1 and 2; but this particular method is not essential.

Instead of having the revolving sleeve held by a spur on the spindle, as shown in Figs. 1 and 2, it may be held by a screw which enters the head of the spindle, the head of the screw being large enough to cover the end of the sleeve. It also has a shoulder, p, as wide as the projection p is thick. The projection p rests against the shoulder 19 on all sides and down on the end of the spindle. The sleeve j, drop-signal k, resetting-arm k, and projection 1) being all attached together, it follows that the projection p prevents the sleeve from sliding in on the spindle, While the enlarged head of the screw prevents it from slipping off, at the same time not interfering with the revolving of the sleeve on the spindle, thus obviating the necessity of spur m and slot 1. (Shown in Figs. 1 and The sleeve j must be either cast integral with drop is and arm A", or must be permanently fastened thereto in some way. The same is true of the armature (l and its sleeve c. The recess h in sleeve e enables the projection 11 on sleeve j to revolve a distance sufficient to bring the drop-signal opposite the opening in the case.

The operation of my device, as hereinbefore described, is as follows, viz: Before the signal is given the mechanism would be in the position shown in Fig. 1, projection '51 projecting into slot g and held by the side thereof. Now, when the electricity makes the cores :0 magnetic they draw the armature (Z and'its sleeve 6 back on the spindle until the projection n of sleeve j no longer rests against the side of slot g, and so the sleeve j, with its signal 70, revolves by the force of gravity acting on the signal. The signal 70 must of course be heavier than arm is. c

Any convenient method may be adopted for resetting the signal and also for completing and breaking the circuit to render the cores as magnetic or to demagnetize them, and a number of these signals may be arranged in a suitable cabinet having windows behind which the drop-signals play. I do not claim as new anything relating to the resetting of, the signal or the arrangement of the mechanism in cabinets.

Having thus described my invention and its use, what I claim, and desire to secure by Letters Patent of the United States, is-

' 1. The combination, with an electro-magnet, of a spindle rigidly erected between the poles thereof, an armature sliding on said spindle and having a sleeve with recesses on the outer end, and a revolving sleeve on the outer end of said spindle carrying drop-signal and resetting-arm and having on the inner end a projection adapted to enter the recesses in the sliding sleeve, all substantially as and for the purposes hereinbefore set forth.

2. The combination, with an electro-magnet, of a spindle rigidly set between the poles thereof, an armature sliding on said spindle and having a sleeve in the outer end of which are recesses, a spring constantly tending to force the armature away from the magnet, and a revolving sleeve carrying drop-signal and resetting-arm and having on its inner end a projection adapted to enter the recesses to prevent said sleeve from revolving, and a revolving sleeve carrying drop-signal and resetting-arm and having on its inner end a projection adapted to enter the recesses in the sliding sleeve, all substantially as and for the purposes set forth.

4. The combination, with an electro-magnet having a spindle set between the poles thereof, and an armature sliding on said spindle having a sleeve in the outer end of which are recesses, of a revolving sleeve carrying drop-signal and resetting-arm and having an inner annular projecting rim resting on the end of the spindle, said sleeve having a projection on its inner end adapted to enter recesses in the sliding sleeve and being held on the spindle by the head of a screw which enters the head of spindle, substantially as and for the purposes set forth.

In testimony that I claim the foregoing as my own I affix my signature in presenceof two witnesses.

WILLIAM o. CLARK.

Vitnesses:

ELGIN C. VERRILL, J os. T. WoonWARn. 

